C2030   ENDCASE does not match DO CASE 

     Explanation:  You specified an ENDCASE statement without a
     corresponding DO CASE statement.  ENDCASE is part of the DO CASE control
     structure syntax and, therefore, cannot occur outside of the structure.
     This error may be due to improperly nested DO CASE structures.

     Action:  Remove the offending ENDCASE statement or fix the nesting
     error, and recompile.